Seven new genera and thirty-four new species of buccinoid gastropods (Neogastropoda: Buccinidae) from the Aleutian Islands, Alaska
Author
Mclean, James H.
Author
Clark, Roger N.
text
Zootaxa
2023
2023-09-26
5351
2
151
201
http://dx.doi.org/10.11646/zootaxa.5351.2.1
journal article
270509
10.11646/zootaxa.5351.2.1
b3b05d51-3aeb-49c7-bbc1-0365bc92c886
1175-5326
8391375
F34F6B3C-F251-4D8E-B002-A96BD70CA1BE
Neptunea aleutica
n. sp.
urn:lsid:zoobank.org:act:
18759E3F-4E07-448B-9461-3D0E2A6537A8
Figures 15 A–C
Type
locality:
S of
Oglodak Island
,
Andreanof Ids.
,
Aleutian Is.
,
Alaska
(
51°47.93 N
,
175°11.74 W
),
273 m
(
NMFS 23-200001
-
95
)
.
Type material:
Holotype
:
LACM
3580, 108.5 mm
(
leg.
14 June, 2000, trawled, R/V
Dominator
)
;
Paratypes
:
Pt
1,
LACM 3635
,
99 mm
. SE of
Kiska Island
,
Rat Ids.
(
51°39.54 N
,
178°26.72 W
)
369 m
(
NMFS 143-200401
-
117
);
Pt
2,
SBMNH 464989
,
72.9 mm
. E of
Kiska Island
,
Rat Ids.
(
51°50.22 N
,
178°06.35 E
),
252 m
(
NMFS 148-201201
-
151
);
Pt
3,
SBMNH 464984
, 71.0 mm.
Amutka Pass
(
52°12.26 N
,
171°38.84 W
),
460 m
(
NMFS 143-201201
-
52
);
Pt
4 & 5,
USNM 1606668
,
89.5 mm
&
72.7 mm
. E of
Kiska Island
,
Rat Ids.
(
51°50.22 N
,
178°06.35 E
),
252 m
(
NMFS 148-201201
-
151
);
Pts
6 & 7,
CASIZ 236196
,
84.2 mm
&
74.8 mm
. E of
Kiska Island
,
Rat Ids.
(
51°50.22 N
,
178°06.35 E
),
252 m
(
NMFS 148-201201
-
151
);
Pt
7 & 8,
RNC
4715, 107.3 mm
&
72.5 mm
.
E of Kiska Island
, rat Ids. ((
51°50.22 N
,
178°06.35 E
),
252 m
(
NMFS 148-201201
-
151
);
Pt
9, Koen Fraussen Coll.
95.7 mm
.
Petrel Bank
, NE of
Semisopochnoi Island
,
Rat Ids.
(
52°02.32 N
,
179°19.51 W
),
283 m
(
NMFS143-201201
-
137
)
.
Description:
Shell moderately large (
holotype
108.5 mm
), pyriform, white with thin brown periostracum. Whorls rounded, suture moderately impressed; protoconch small,
2.2–2.6 mm
in diameter, with three whorls; teleconch with four whorls, early whorls with a single carination. Axial sculpture lacking. Mature shell with about five weak primary spiral cords above suture, with
one intercalary
secondary cord between primary cords and finer tertiary cords between; cords of base similar, but more closely crowded and loosing distinction between primary and secondary cords. Mature lip not flared or much thickened; canal short, twisted.
Radula: Typical neptuniid, rachidian tooth broad, quadrate, indented anteriorly, bearing four equal-sized cusps. Lateral teeth tri-cuspid, cups well-spaced, outer cusp long, rather slender, curved, central cusp less than half the length of outer cusp, slightly bent, inner cusp very slightly larger than inner one, only slightly bent.
Remarks:
Neptunea aleutica
differs from the similar
Neptunea quhmax
n. sp.
by 1) the thinner shell, 2) broader profile with longer aperture and less impressed suture and 3) less projecting spiral cords. Shells are often partially covered with colonies of the encrusting hydroid,
Hydractinia spp
.
Etymology:
Name refers to the Aleutian Islands.
Distribution:
Central Aleutians, Amutka Pass (
171°38 W
) to near Kiska Island, Rat Ids. (
178°06 E
) at depths of
103–
460 m
.
Habitat:
Found on gravel, pebble and sand/shell hash bottoms, with a temperature of 3.7°–3.9°C.